SRAM RED eTap Rear Derailleur - 11-Speed Short Cage Black A2The SRAM RED eTap rear derailleur wirelessly executes shifts the instant you demand. It's easy to set up clean in appearance and delightfully uncomplicated. Mechanical necessities such as a carbon pulley cage ceramic pulley bearings and anodized alloy artfully blend with proprietary electronic advancements to deliver a shifting wonder. Rear Derailleur Mount Type 10x1 Standard Drivetrain Speeds 11 Cage Length Short Largest Cog 32 Color Black Rear Der